Lightweight. Unobtrusive. Style-agnostic. Build your look on the web, not Twitter's – and build it fluid. Layers CSS is aimed for practical use and comes with zero bullshit.

bluePen Editor is an Online Visual CSS editor built for you. It's a web application that allows you to edit your existing stylesheets on your website.

This is done by the "What You See Is What You Get" principle so you don't need any special skills.

The CSS Color Gradient Generator is an excellent tool for creating some amazing CSS3 gradients without the hassle of learning the correct declaration syntax for Webkit, Mozilla and other browsers. Simply select one of the presets, or create your own HTML5-compatible CSS3 gradients for your projects. Also provided is CSS Framework support for SASS/SCSS and LESS.